nz-carousel[class^="nz-carousel__dot-"] {
    .slick-dots li button {
        background: @grey-10;
    }
}

// color
.for-each(@colors, {
    .nz-carousel__dot-@{key} {
        .slick-dots li.slick-active button {
            background: extract(@item, @color-basic-position) !important;
        }
    }
});